Valorization of Vine Prunings by Slow Pyrolysis in a Fixed-Bed Reactor

Calcan, Suzana Ioana; Pârvulescu, Oana Cristina; Ion, Violeta Alexandra; Raducanu, Cristian; Bădulescu, L.; Dobre, Tănase; Egri, Diana; Moț, Andrei; Popa, V. I.; Crăciun, Mihaela Emanuela

doi:10.3390/pr10010037

Cited by 11 publications

(4 citation statements)

References 52 publications

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“…The average TC content in grapevine pruning residues was 44.5%, which is similar to other studies [49][50][51], where authors reported values from 44.1% to 47.8%. In biochar, the average TC content was 75.4%, which agrees with the results of other studies (73.5%) [50], while a recent study reported even lower TC content (69.4%) [52]. Biochar TC content was not affected by rootstock type, showing a predominant effect of grapevine-pruning residues as feedstock [53].…”

Section: Discussionsupporting

confidence: 89%

Biochar from Grapevine-Pruning Residues Is Affected by Grapevine Rootstock and Pyrolysis Temperature

et al. 2023

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In recent years, the production and application of biochar as a soil amendment produced from pruning residues has gained attention worldwide. Since the effect of grapevine rootstock type on grapevine-pruning residues used as feedstock for biochar production had not yet been researched, the present research was performed. Two grapevine rootstocks, different in vigor, were selected, with the hypothesis that they would affect their chemical composition and, consequently, the composition of the produced biochar. In this work, grapevine-pruning residues of the indigenous variety “Istrian Malvasia” (Vitis vinifera L.) grafted on 420A and SO4 rootstocks were analyzed and used for biochar production under three peak temperature programs (400 °C, 500 °C, and 600 °C). Higher pyrolysis temperature decreased yield but increased EC, ash, and TC content, as well as the content of most of the studied elements. On the other hand, grapevine rootstock type affected biochar EC, ash content, and specific surface area. Results showed that a more vigorous rootstock affects the produced biochar qualities by enhancing the above-mentioned properties. The present research showed that biochar produced from grapevine-pruning residues, especially at 500 °C or 600 °C, could be a valuable tool for the valorization of this biomass as a soil amendment.

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Section: Discussionsupporting

confidence: 89%

Biochar from Grapevine-Pruning Residues Is Affected by Grapevine Rootstock and Pyrolysis Temperature

et al. 2023

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“…Enhanced soil fertility not only reduces the need for additional fertilizer inputs but also boosts crop productivity, subsequently increasing CO 2 absorption; this, in turn, generates a range of advantages, encompassing agricultural, environmental, and economic benefits [30]. The impact of biochar on the soil-plant system is contingent on a multitude of variables, including the physicochemical attributes and quantity of biochar, the type and quantity of fertilizer, the specific plant species, soil properties, and prevailing climatic conditions [31]. The advantages of biochar amendment are particularly pronounced in sandy soils, with sandy loam soils following closely in terms of agronomic benefits.…”

Section: Introductionmentioning

confidence: 99%

Mitigating Soil Erosion through Biomass-Derived Biochar: Exploring the Influence of Feedstock Types and Pyrolysis Temperature

Wani,

Akhter,

Kumar

et al. 2023

Land

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Soil erosion is one of the major emerging threats to the Himalayan ecosystem. There is a dearth of diverse, cost-effective erosion control measures in the region. In the Himalayan region, where agriculture plays a pivotal role in local livelihoods and environmental stability, the management of soil erosion is of paramount importance. Hence, this study investigates the impact of biochar application on soil erosion and its related indices in the temperate Himalayas of India. This study employs a combination of physicochemical analysis and field experiments to assess the influence of biochar on soil erodibility. The research objectives include an examination of the influence of different temperature pyrolyzed biomasses and varying application rates on soil erodibility indices, viz., dispersion ratio (DR), percolation ratio (PR), clay ratio (CR), erosion ratio (ER), and mean weight diameter (MWD), considering two distinct fertilizer regimes. This study yielded quantitative results that shed light on the impact of various soil amendments and application rates on soil erodibility in the temperate Himalayas. Results showed that the mean values of the DR exhibited by amendment levels NB, AB400, AB600, RAC, DW400, DW600, and RDW were 0.37, 0.35, 0.51, 0.44, 0.51, 0.47, and 0.91, respectively. The mean values of DR for different amendment levels varied, with RDW exhibiting the highest erodibility at 0.91, while DW400 and DW600 demonstrated less soil disturbance, making them promising choices for soil erosion mitigation. Notably, the application of pyrolyzed weed residue improved soil erodibility, whereas AB600 resulted in increased soil erosion due to aggregate disintegration, as indicated by the MWD. Aquatic weed residues and apple wood chips applied without pyrolysis increased the soil erodibility, while pyrolyzed residues improved soil erodibility. The DR was 0.41 at the high application rate, 0.48 at the medium rate, and 0.61 at the low application rate. Among application rates, low rates (1 t ha−1) had the highest DR, followed by medium rates (2 t ha−1) and high rates (3 t ha−1). The no-fertilizer level exhibited higher DR (0.49) compared to the fertilized level (0.38). Results inferred that the application of AB400 °C at 3 t ha−1 can be adopted to minimize soil erosion and maintain ecological security in the temperate Himalayas.

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“…Relevant variables of alkaline pretreatment in terms of solid/liquid ratio (RSL = 0.5-1.5 g/100 mL), US amplitude (A = 20-60%), and working temperature (t = 30-50 °C) were selected as independent variables (factors).The effects of these process factors on dependent variables (responses), i.e., the yields of lignin (YL) and sugars (YS), were quantified using statistical models based on 2 3 factorial design [28]. According to a 2 3 factorial design, 8 experimental runs (1-8 in Table 1) were performed at 2 levels (minimum and maximum) of process factors.…”

Section: Statistical Modelsmentioning

confidence: 99%

Ultrasound Assisted Alkaline Pretreatment of Biomass to Enhance the Extraction Yield of Valuable Chemicals

Gavrila,

Vartolomei,

Calinescu

et al. 2024

Preprint

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Lignocellulosic biomass, an abundant and renewable resource, serves as a crucial raw material for the production of biofuels, biochemicals, and various value-added products. This paper aims to develop and optimize a mild alkaline treatment of sawdust assisted by ultrasound, along with enzymatic hydrolysis of the pretreated material. The sonochemical pretreatment with alkali emerged as the optimal approach to enhance the susceptibility of cellulose to subsequent enzymatic hydrolysis, thereby increasing the yield of reducing sugars. A comparative study was performed using various ultrasonic applicators (horn and bath) and conventional assisted alkaline pretreatment. The ultrasonic assisted pretreatment revealed a higher delignification as 68% (horn) and 57% (bath) comparing with conventional pretreatment. Processes were optimized using a statistical analysis based on a 23 factorial design. The ratio between sawdust and alkanine solution (RSL = 0.5–1.5 g/100 mL), US amplitude (A = 20–60%), and working temperature (t = 30–50 °C) were selected as process factors. The optimal operating conditions to maximize the reducing sugar yield (138.15 mg GE /gsubstrate) were found as following: solid/liquid ratio RSL,opt = 1.25 g/100 mL, US amplitude Aopt = 60%, and and pretreatment temperature topt = 50 °C. The overall outcomes clearly confirmed the intensification of delignification by ultrasound assisted alkaline pretreatment

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Valorization of Vine Prunings by Slow Pyrolysis in a Fixed-Bed Reactor

Cited by 11 publications

References 52 publications

Biochar from Grapevine-Pruning Residues Is Affected by Grapevine Rootstock and Pyrolysis Temperature

Biochar from Grapevine-Pruning Residues Is Affected by Grapevine Rootstock and Pyrolysis Temperature

Mitigating Soil Erosion through Biomass-Derived Biochar: Exploring the Influence of Feedstock Types and Pyrolysis Temperature

Ultrasound Assisted Alkaline Pretreatment of Biomass to Enhance the Extraction Yield of Valuable Chemicals

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